Partial discharge testing of defects in dielectric insulation under DC and voltage ripple conditions

Partial discharge testing of defects in dielectric insulation under DC and voltage ripple conditions
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直流和电压纹波条件下介电绝缘缺陷的局部放电测试

DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
R. Giussani
R. Giussani
中科院分区：
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文献类型：
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作者：
E. Corr;A. Reid;Xiao Hu;W. H. Siew;M. Zhu;M. Judd;M. Seltzer;R. Giussani

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本文详细介绍了对介质绝缘中选定的孔洞缺陷进行的测试。 不同高压直流电压条件下的样品。这项工作的目的是说明帕金森病的类型 可以在高压直流绝缘系统中观察到的活动。最初，这些样本要经过 暖通交流励磁以确认缺陷类型并建立局部放电起始电压。高压直流测试是 然后使用具有斜坡中不同保持电压的斜坡和保持测试技术来进行 根据测量的暖通空调起始电压确定。简谐波纹叠加效应 在通常是换流站切换操作结果的高压直流电压波形上， 也进行了调查。这项研究的发现应该会为网络运营商和隔离提供参考 制造商更深入地了解高压直流输电下固体绝缘中局部放电现象的行为 条件，使诊断这类系统中的缺陷类型和严重程度更有信心。
This paper details testing conducted on selected void defects in dielectric insulation samples under various HVDC voltage conditions. The aim of this work is to illustrate the type of PD activity that could be observed in HVDC insulation systems. Initially the samples were subject to HVAC excitation to confirm the defect type and establish the PD inception voltage. HVDC testing was then conducted using a ‘ramp and hold’ test technique with different hold voltages in the ramp determined from the measured HVAC inception voltage. The effect of harmonic ripple superimposed on the HVDC voltage waveform, which is typically a result of the converter switching operation, was also investigated. The findings from this study should provide network operators and insulation manufacturers a greater insight into the behavior of PD phenomena in solid insulation under HVDC conditions, enabling greater confidence in the diagnosis of defect type and severity in such systems.